SLING-5860 : Require maven version 3.3.9
SLING-5860 : Require maven version 3.3.9

git-svn-id: 6eed74fe9a15c8da84b9a8d7f2960c0406113ece@1753209 13f79535-47bb-0310-9956-ffa450edef68

mikibrv/sling,ieb/sling,roele/sling,anchela/sling,ieb/sling,Nimco/sling,ist-dresden/sling,mcdan/sling,mikibrv/sling,Nimco/sling,ieb/sling,mikibrv/sling,mikibrv/sling,mcdan/sling,ieb/sling,anchela/sling,Nimco/sling,vladbailescu/sling,tmaret/sling,cleliameneghin/sling,mikibrv/sling,vladbailescu/sling,mcdan/sling,headwirecom/sling,cleliameneghin/sling,anchela/sling,trekawek/sling,awadheshv/sling,anchela/sling,Nimco/sling,JEBailey/sling,ist-dresden/sling,tmaret/sling,JEBailey/sling,JEBailey/sling,headwirecom/sling,labertasch/sling,labertasch/sling,cleliameneghin/sling,roele/sling,mikibrv/sling,roele/sling,roele/sling,ist-dresden/sling,anchela/sling,trekawek/sling,roele/sling,cleliameneghin/sling,mcdan/sling,tmaret/sling,JEBailey/sling,mcdan/sling,headwirecom/sling,awadheshv/sling,ist-dresden/sling,mcdan/sling,labertasch/sling,ieb/sling,trekawek/sling,tmaret/sling,trekawek/sling,labertasch/sling,awadheshv/sling,ist-dresden/sling,trekawek/sling,cleliameneghin/sling,tmaret/sling,vladbailescu/sling,labertasch/sling,Nimco/sling,vladbailescu/sling,awadheshv/sling,awadheshv/sling,JEBailey/sling,headwirecom/sling,vladbailescu/sling,Nimco/sling,headwirecom/sling,ieb/sling,trekawek/sling,awadheshv/sling